/*
 *  JsonRpc-Cpp - JSON-RPC implementation.
 *  Copyright (C) 2008-2011 Sebastien Vincent <sebastien.vincent@cppextrem.com>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * \file jsonrpc_udpserver.h
 * \brief JSON-RPC UDP server.
 * \author Sebastien Vincent
 */

#ifndef JSONRPC_UDPSERVER_H
#define JSONRPC_UDPSERVER_H

#include "jsonrpc_common.h"
#include "jsonrpc_server.h"

namespace Json
{
namespace Rpc
{
/**
 * \class UdpServer
 * \brief JSON-RPC UDP server implementation.
 */
class UdpServer: public Server
{
public:
	/**
	 * \brief Constructor.
	 * \param address network address or FQDN to bind
	 * \param port local port to bind
	 */
	UdpServer(const std::string& address, uint16_t port);

	/**
	 * \brief Destructor.
	 */
	virtual ~UdpServer();

	/**
	 * \brief Receive data from the network and process it.
	 * \param fd file descriptor on which receive
	 * \return true if message has been correctly received, processed and
	 * response sent, false otherwise (mainly sendto/recvfrom error)
	 * \note This method will blocked until data comes.
	 */
	virtual bool Recv(int fd);

	/**
	 * \brief Send data.
	 * \param data data to send
	 * \param addr sockaddr address
	 * \param addrlen sizeof addr
	 * \return number of bytes sent or -1 if error
	 */
	ssize_t Send(const std::string& data, const struct sockaddr* addr,
			socklen_t addrlen);

	/**
	 * \brief Wait message.
	 *
	 * This function do a select() on the socket and Process() immediately
	 * the JSON-RPC message.
	 * \param ms millisecond to wait (0 means infinite)
	 */
	virtual void WaitMessage(uint32_t ms);

private:
	/**
	 * \brief Copy constructor (private because of "resource" class).
	 * \param obj object to copy
	 */
	UdpServer(const UdpServer& obj);

	/**
	 * \brief Operator copy assignment (private because of "resource"
	 * class).
	 * \param obj object to copy
	 * \return copied object reference
	 */
	UdpServer& operator=(const UdpServer& obj);

};
} /* namespace Rpc */
} /* namespace Json */

#endif /* JSONRPC_UDPSERVER_H */

